Pumps – Motor driven – Axial thrust balancing means for rotary pump and motor
Patent
1984-03-22
1985-06-18
Croyle, Carlton R.
Pumps
Motor driven
Axial thrust balancing means for rotary pump and motor
417424, 415143, 415211, F04B 1700
Patent
active
045239002
ABSTRACT:
The combination of a motor-driven impeller pump assembly and a self-priming column attachment. The column attachment is detachably secured to the pump assembly and includes an elongate shaft exterior which is attached to an impeller in the pump assembly with a detachable connection. An axial flow inducer is located at the bottom end of the column attachment and serves to lift a fluid in the column towards the impeller. A balance line conduit extends from a balance chamber located behind the impeller downwards on the extension of the column to the level of the axial flow inducer, thereby serving to lessen axially imbalanced forces acting on the impeller pump assembly. The column also includes a set of straightener vanes to reduce rotational flow through the length of the column. A double-volute chamber surrounding the impeller serves to radially balance forces acting on the impeller, the motor and their associated bearings.
REFERENCES:
patent: 2865296 (1958-12-01), Bungartz
patent: 2881707 (1959-04-01), Thompson
patent: 2896544 (1959-07-01), Ogles et al.
patent: 3723019 (1973-03-01), Berman
patent: 3975117 (1976-08-01), Carter
patent: 4335886 (1982-06-01), Frey et al.
Fiese and Firstenberger Mfg., Inc. product brochure.
Croyle Carlton R.
Roper Industries, Inc.
Stout Donald E.
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